Emergency car-brake.



No. 754,181. PATENTED MAR.'8, 1904. M. WOLTZ. EMERGENCY GAR BRAKE.

APPLICATION FILED DEG. 3, 1903.

N0 MODEL.

UNITED STATES iatented March 8, 1904.

PATENT OFFIoE.

EMERGENCY CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 754,181, dated March 8,1904. Application filed December 3, 1903. fierial No. 183,652- (Nomodel.)

To all whom it may concern.-

Be it known that I, MICHAEL WoLTz, a subject of the Emperor ofAustria-Hungary, residing at Wilkins township, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Emergency Car-Brakes, of which the following is aspecification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements incar-brakes, and relates more particularly to that class of brakes knowngenerally as emergency brakes, adapted for use only when it is desiredto suddenly check the momentum of the car.

Briefly described, the invention embodies the providing of the flangesof the car-wheels with notches or teeth and the employment of toothedshoes adaptedto be brought into engagement with the toothed flanges ofthe wheels, whereby to look the wheels against revolution when desired.

In describing the invention in detail reference will be had to theaccompanying draw-' ings, showing a practical embodiment of theinvention, without, however, limiting myself in practice to the exactconstruction shown and described.

In the drawings, Figure 1 is a side elevation of a part of a carequipped with my improved brake. Fig. 2 is a detached detail perspectiveView of the brake. Fig. 3 is a detached detail edge view of one of thewheels. Fig. 1 is a detached detail perspective view of a part of thesuspending means for holding the brake in its normal or inoperativeposition. I

To put my invention into practice, I provide the flanges 1 of the wheels2 with teeth, as shown, to be engaged by toothed shoes 3, carried bysuspending means, as will be described. These shoes 3 are securedrigidly to the one end of levers 4:, which levers at their other endsare apertured to receive'therethrough a rod or shaft 5, having its endsjournaled in brackets or hangers 6, rigidly secured to the car-body 7.The shoes 3 are connected by a cross-bar 8, and the levers 1 areconnected at their free ends by a cross-bar 9, under which passes alever 10, having its one end received on the rod or shaft 5 and to itsother end is fastened a chain or other flexible connection 11,

drum 12, has the forked end of a lever 16 mounted thereon, by which thedrum is operated. The lever 10 carries a hook 17, which engages with thecross-bar 8. A catch 18 may be provided for holding the brake apparatusnormally elevated, and a spring 19, interposed between the car-platformand the lever 10, forces the lever downward when released.

' In operation the catch 18 is normally engaged with the lever 16, thusholding the toothed shoes 3 normally out of engagement with thetoothedflanges 1 of the wheels. In case, however, it is desired to suddenlycheck the speed of the car, then catch 18 is detached or disengaged fromthe lever 16, and spring 19 forces the shoes into engagement with thetoothed flanges of the wheels, locking the latter against revolution.

While I have herein shown and described the invention in detail, it willbe evident that various slight changes may be made in the details ofconstruction without departing from the general spirit of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an emergency car-brake, the combination with the car-wheelsprovided with toothed flanges, of a rod or shaft supported from thecar-body, a pair of levers hung on said rod or shaft, toothedbrake-shoes carried by said levers, a cross-bar connecting the levers, acrossbar connecting the toothed shoes, an actuating-lever hung on therod or shaft, extending under thejcross-bar connecting the pair oflevers, a hook carried by said lever and engaging the cross-barconnecting the toothed shoes, and means connected to the free end ofsaid lever for holding the toothed shoes normally out of engagementwiththe toothed flanges of the wheels, substantially as described.

2. In an emergency car-brake, the'combination with the ,car wheelshaving toothed In testimony whereof It aflix my signature in thepresence of two witnesses.

MICHAEL WOLTZ;

Witnesses:

A. M. WILsON, E. E. POTTER,

